!5067 fix post training quant log

Merge pull request !5067 from xutianchun/quant_0824

mindspore/lite/tools/anf_exporter/anf_exporter.cc

@@ -69,6 +69,10 @@ int AnfExporter::ConvertQuantParam(const std::unique_ptr<schema::MetaGraphT> &me
     // activation
     auto input_quant_params = primitive->GetInputQuantParams();
     auto node_type = (schema::PrimitiveType)primitive->Type();
+    if (input_quant_params.empty()) {
+      MS_LOG(ERROR) << "node: " << dst_node->name << " input quant params is empty";
+      return RET_ERROR;
+    }
     for (size_t i = 0; i < input_quant_params.size(); i++) {
       if (i >= dst_node->inputIndex.size()) {
         MS_LOG(ERROR) << "node: " << dst_node->name << " input has " << input_quant_params.size()
@@ -93,7 +97,10 @@ int AnfExporter::ConvertQuantParam(const std::unique_ptr<schema::MetaGraphT> &me
     auto tensor_output = meta_graph->allTensors[output_index].get();
     auto output_quant_params = primitive->GetOutputQuantParams();
     if (output_quant_params.empty()) {
-      MS_LOG(WARNING) << "node: " << dst_node->name << " output quant params is empty";
+      if (node_type != schema::PrimitiveType_QuantDTypeCast) {
+        MS_LOG(ERROR) << "node: " << dst_node->name << " output quant params is empty";
+        return RET_ERROR;
+      }
     } else {
       for (auto output_quant_param : output_quant_params[0]) {
         if (tensor_output->quantParams.empty()) {

mindspore/lite/tools/converter/quantizer/quantize_util.cc

@@ -168,11 +168,11 @@ STATUS CalQuantizationParams(schema::QuantParamT *quantParam, double mMin, doubl
                              int quant_max, int quant_min, int num_bits) {
   MS_ASSERT(quantParam != nullptr);
   if (mMin > 0.0f) {
-    MS_LOG(ERROR) << "min " << mMin << " is bigger then 0, set to 0, this may course low precision";
+    MS_LOG(DEBUG) << "min " << mMin << " is bigger then 0, set to 0, this may course low precision";
     mMin = 0.0f;
   }
   if (mMax < 0.0f) {
-    MS_LOG(ERROR) << "mMax " << mMax << " is smaller than 0, set to 0, this may course low precision";
+    MS_LOG(DEBUG) << "mMax " << mMax << " is smaller than 0, set to 0, this may course low precision";
     mMax = 0.0f;
   }
   if (mMin > mMax) {